diff --git a/etherparse/src/link/ethernet2_header_slice.rs b/etherparse/src/link/ethernet2_header_slice.rs
index 17d51915..8a26f27f 100644
--- a/etherparse/src/link/ethernet2_header_slice.rs
+++ b/etherparse/src/link/ethernet2_header_slice.rs
@@ -43,7 +43,7 @@ impl<'a> Ethernet2HeaderSlice<'a> {
     /// [`Ethernet2Header::LEN`]
     #[inline]
     #[cfg(feature = "std")]
-    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ethernet2HeaderSlice {
+    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ethernet2HeaderSlice<'_> {
         debug_assert!(slice.len() == Ethernet2Header::LEN);
         Ethernet2HeaderSlice { slice }
     }
diff --git a/etherparse/src/link/linux_sll_header_slice.rs b/etherparse/src/link/linux_sll_header_slice.rs
index dbf96da7..4ae73152 100644
--- a/etherparse/src/link/linux_sll_header_slice.rs
+++ b/etherparse/src/link/linux_sll_header_slice.rs
@@ -72,7 +72,7 @@ impl<'a> LinuxSllHeaderSlice<'a> {
     /// [`LinuxSllHeader::LEN`] and the fields are valid
     #[inline]
     #[cfg(feature = "std")]
-    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> LinuxSllHeaderSlice {
+    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> LinuxSllHeaderSlice<'_> {
         debug_assert!(slice.len() == LinuxSllHeader::LEN);
         LinuxSllHeaderSlice { slice }
     }
diff --git a/etherparse/src/link/single_vlan_header_slice.rs b/etherparse/src/link/single_vlan_header_slice.rs
index 2406cc6d..e25ca572 100644
--- a/etherparse/src/link/single_vlan_header_slice.rs
+++ b/etherparse/src/link/single_vlan_header_slice.rs
@@ -43,7 +43,7 @@ impl<'a> SingleVlanHeaderSlice<'a> {
     /// The caller must ensured that the given slice has the length of
     /// [`SingleVlanHeader::LEN`]
     #[inline]
-    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> SingleVlanHeaderSlice {
+    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> SingleVlanHeaderSlice<'_> {
         SingleVlanHeaderSlice { slice }
     }
 
diff --git a/etherparse/src/net/ip_slice.rs b/etherparse/src/net/ip_slice.rs
index 5c7eb5f5..2d7f594f 100644
--- a/etherparse/src/net/ip_slice.rs
+++ b/etherparse/src/net/ip_slice.rs
@@ -15,7 +15,7 @@ pub enum IpSlice<'a> {
 
 impl<'a> IpSlice<'a> {
     /// Returns a reference to the `Ipv4Slice` if `self` is a `IpSlice::Ipv4`.
-    pub fn ipv4(&self) -> Option<&Ipv4Slice> {
+    pub fn ipv4(&self) -> Option<&Ipv4Slice<'_>> {
         use IpSlice::*;
         match self {
             Ipv4(slice) => Some(slice),
@@ -24,7 +24,7 @@ impl<'a> IpSlice<'a> {
     }
 
     /// Returns a reference to the `Ipv6Slice` if `self` is a `IpSlice::Ipv6`.
-    pub fn ipv6(&self) -> Option<&Ipv6Slice> {
+    pub fn ipv6(&self) -> Option<&Ipv6Slice<'_>> {
         use IpSlice::*;
         match self {
             Ipv4(_) => None,
@@ -83,7 +83,7 @@ impl<'a> IpSlice<'a> {
     /// Separates and validates IP headers (including extension headers)
     /// in the given slice and determine the sub-slice containing the payload
     /// of the IP packet.
-    pub fn from_slice(slice: &[u8]) -> Result<IpSlice, err::ip::SliceError> {
+    pub fn from_slice(slice: &[u8]) -> Result<IpSlice<'_>, err::ip::SliceError> {
         use crate::ip_number::AUTH;
         use err::ip::{HeaderError::*, HeadersError::*, SliceError::*};
         use IpSlice::*;
diff --git a/etherparse/src/net/ipv4_header_slice.rs b/etherparse/src/net/ipv4_header_slice.rs
index 1dcf250d..74aaef08 100644
--- a/etherparse/src/net/ipv4_header_slice.rs
+++ b/etherparse/src/net/ipv4_header_slice.rs
@@ -89,7 +89,7 @@ impl<'a> Ipv4HeaderSlice<'a> {
     /// It must ensured that the slice exactly contains the IPv4 header
     /// and the ihl (intra header length) & total length must be consistent.
     #[inline]
-    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ipv4HeaderSlice {
+    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ipv4HeaderSlice<'_> {
         Ipv4HeaderSlice { slice }
     }
 
diff --git a/etherparse/src/net/ipv4_options.rs b/etherparse/src/net/ipv4_options.rs
index f741a072..6518d4c3 100644
--- a/etherparse/src/net/ipv4_options.rs
+++ b/etherparse/src/net/ipv4_options.rs
@@ -141,7 +141,7 @@ impl core::hash::Hash for Ipv4Options {
 
 impl core::cmp::PartialOrd for Ipv4Options {
     fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
-        Some(self.as_slice().cmp(other.as_slice()))
+        Some(self.cmp(other))
     }
 }
 
diff --git a/etherparse/src/net/ipv4_slice.rs b/etherparse/src/net/ipv4_slice.rs
index e22a566a..913ab5ce 100644
--- a/etherparse/src/net/ipv4_slice.rs
+++ b/etherparse/src/net/ipv4_slice.rs
@@ -22,7 +22,7 @@ impl<'a> Ipv4Slice<'a> {
     ///
     /// If you want to ignore these kind of length errors based on the length
     /// fields in the IP headers use [`crate::LaxIpv4Slice::from_slice`] instead.
-    pub fn from_slice(slice: &[u8]) -> Result<Ipv4Slice, SliceError> {
+    pub fn from_slice(slice: &[u8]) -> Result<Ipv4Slice<'_>, SliceError> {
         use crate::ip_number::AUTH;
 
         // decode the header
@@ -118,13 +118,13 @@ impl<'a> Ipv4Slice<'a> {
 
     /// Returns a slice containing the IPv4 header.
     #[inline]
-    pub fn header(&self) -> Ipv4HeaderSlice {
+    pub fn header(&self) -> Ipv4HeaderSlice<'_> {
         self.header
     }
 
     /// Returns a slice containing the IPv4 extension headers.
     #[inline]
-    pub fn extensions(&self) -> Ipv4ExtensionsSlice {
+    pub fn extensions(&self) -> Ipv4ExtensionsSlice<'_> {
         self.exts
     }
 
diff --git a/etherparse/src/net/ipv6_header_slice.rs b/etherparse/src/net/ipv6_header_slice.rs
index fef8b05e..ce54d5c8 100644
--- a/etherparse/src/net/ipv6_header_slice.rs
+++ b/etherparse/src/net/ipv6_header_slice.rs
@@ -56,7 +56,7 @@ impl<'a> Ipv6HeaderSlice<'a> {
     ///
     /// It must ensured that the slice length is at least [`Ipv6Header::LEN`].
     #[inline]
-    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ipv6HeaderSlice {
+    pub(crate) unsafe fn from_slice_unchecked(slice: &[u8]) -> Ipv6HeaderSlice<'_> {
         Ipv6HeaderSlice { slice }
     }
 
diff --git a/etherparse/src/net/lax_ip_slice.rs b/etherparse/src/net/lax_ip_slice.rs
index 928102ee..e189bf1a 100644
--- a/etherparse/src/net/lax_ip_slice.rs
+++ b/etherparse/src/net/lax_ip_slice.rs
@@ -24,7 +24,7 @@ pub enum LaxIpSlice<'a> {
 
 impl<'a> LaxIpSlice<'a> {
     /// Returns a reference to the `Ipv4Slice` if `self` is a `IpSlice::Ipv4`.
-    pub fn ipv4(&self) -> Option<&LaxIpv4Slice> {
+    pub fn ipv4(&self) -> Option<&LaxIpv4Slice<'_>> {
         use LaxIpSlice::*;
         match self {
             Ipv4(slice) => Some(slice),
@@ -33,7 +33,7 @@ impl<'a> LaxIpSlice<'a> {
     }
 
     /// Returns a reference to the `Ipv6Slice` if `self` is a `IpSlice::Ipv6`.
-    pub fn ipv6(&self) -> Option<&LaxIpv6Slice> {
+    pub fn ipv6(&self) -> Option<&LaxIpv6Slice<'_>> {
         use LaxIpSlice::*;
         match self {
             Ipv4(_) => None,
@@ -141,7 +141,7 @@ impl<'a> LaxIpSlice<'a> {
         slice: &[u8],
     ) -> Result<
         (
-            LaxIpSlice,
+            LaxIpSlice<'_>,
             Option<(err::ipv6_exts::HeaderSliceError, err::Layer)>,
         ),
         err::ip::LaxHeaderSliceError,
diff --git a/etherparse/src/net/lax_ipv4_slice.rs b/etherparse/src/net/lax_ipv4_slice.rs
index a9082da0..04ba77d9 100644
--- a/etherparse/src/net/lax_ipv4_slice.rs
+++ b/etherparse/src/net/lax_ipv4_slice.rs
@@ -70,8 +70,10 @@ impl<'a> LaxIpv4Slice<'a> {
     /// is set to [`LenSource::Ipv4HeaderTotalLen`].
     pub fn from_slice(
         slice: &[u8],
-    ) -> Result<(LaxIpv4Slice, Option<err::ip_auth::HeaderSliceError>), err::ipv4::HeaderSliceError>
-    {
+    ) -> Result<
+        (LaxIpv4Slice<'_>, Option<err::ip_auth::HeaderSliceError>),
+        err::ipv4::HeaderSliceError,
+    > {
         use crate::ip_number::AUTH;
 
         // decode the header
@@ -197,13 +199,13 @@ impl<'a> LaxIpv4Slice<'a> {
 
     /// Returns a slice containing the IPv4 header.
     #[inline]
-    pub fn header(&self) -> Ipv4HeaderSlice {
+    pub fn header(&self) -> Ipv4HeaderSlice<'_> {
         self.header
     }
 
     /// Returns a slice containing the IPv4 extension headers.
     #[inline]
-    pub fn extensions(&self) -> Ipv4ExtensionsSlice {
+    pub fn extensions(&self) -> Ipv4ExtensionsSlice<'_> {
         self.exts
     }
 
diff --git a/etherparse/src/net/net_slice.rs b/etherparse/src/net/net_slice.rs
index f7d20f72..7952bea5 100644
--- a/etherparse/src/net/net_slice.rs
+++ b/etherparse/src/net/net_slice.rs
@@ -70,7 +70,7 @@ impl<'a> NetSlice<'a> {
 
     /// Returns references to the ARP packet slice if the slice contains an ARP values.
     #[inline]
-    pub fn arp_ref(&self) -> Option<&ArpPacketSlice> {
+    pub fn arp_ref(&self) -> Option<&ArpPacketSlice<'_>> {
         if let NetSlice::Arp(arp) = self {
             Some(arp)
         } else {
diff --git a/etherparse/src/packet_headers.rs b/etherparse/src/packet_headers.rs
index 4aa4e98f..84fd8c7b 100644
--- a/etherparse/src/packet_headers.rs
+++ b/etherparse/src/packet_headers.rs
@@ -360,7 +360,7 @@ impl<'a> PacketHeaders<'a> {
     ///     }
     /// }
     /// ```
-    pub fn from_ip_slice(slice: &[u8]) -> Result<PacketHeaders, err::packet::SliceError> {
+    pub fn from_ip_slice(slice: &[u8]) -> Result<PacketHeaders<'_>, err::packet::SliceError> {
         use err::packet::SliceError::*;
 
         // read ip headers
diff --git a/etherparse/src/transport/tcp_header.rs b/etherparse/src/transport/tcp_header.rs
index a26ce532..6313fc18 100644
--- a/etherparse/src/transport/tcp_header.rs
+++ b/etherparse/src/transport/tcp_header.rs
@@ -202,7 +202,7 @@ impl TcpHeader {
     /// Returns an iterator that allows to iterate through all
     /// known TCP header options.
     #[inline]
-    pub fn options_iterator(&self) -> TcpOptionsIterator {
+    pub fn options_iterator(&self) -> TcpOptionsIterator<'_> {
         self.options.elements_iter()
     }
 
diff --git a/etherparse/src/transport/tcp_header_slice.rs b/etherparse/src/transport/tcp_header_slice.rs
index 01889d4d..6bcecf7b 100644
--- a/etherparse/src/transport/tcp_header_slice.rs
+++ b/etherparse/src/transport/tcp_header_slice.rs
@@ -281,7 +281,7 @@ impl<'a> TcpHeaderSlice<'a> {
 
     /// Returns an iterator that allows to iterate through all known TCP header options.
     #[inline]
-    pub fn options_iterator(&self) -> TcpOptionsIterator {
+    pub fn options_iterator(&self) -> TcpOptionsIterator<'_> {
         TcpOptionsIterator::from_slice(self.options())
     }
 
diff --git a/etherparse/src/transport/tcp_options.rs b/etherparse/src/transport/tcp_options.rs
index 8c2720b0..43da9f62 100644
--- a/etherparse/src/transport/tcp_options.rs
+++ b/etherparse/src/transport/tcp_options.rs
@@ -456,7 +456,7 @@ impl TcpOptions {
     /// assert_eq!(v, vec![Ok(WindowScale(123)), Ok(Noop), Ok(Noop)]);
     /// ```
     #[inline]
-    pub fn elements_iter(&self) -> TcpOptionsIterator {
+    pub fn elements_iter(&self) -> TcpOptionsIterator<'_> {
         TcpOptionsIterator {
             options: self.as_slice(),
         }
@@ -512,7 +512,7 @@ impl core::hash::Hash for TcpOptions {
 
 impl core::cmp::PartialOrd for TcpOptions {
     fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
-        Some(self.as_slice().cmp(other.as_slice()))
+        Some(self.cmp(other))
     }
 }
 
diff --git a/etherparse/src/transport/tcp_slice.rs b/etherparse/src/transport/tcp_slice.rs
index f25479f4..fcde9e39 100644
--- a/etherparse/src/transport/tcp_slice.rs
+++ b/etherparse/src/transport/tcp_slice.rs
@@ -309,7 +309,7 @@ impl<'a> TcpSlice<'a> {
 
     /// Returns an iterator that allows to iterate through all known TCP header options.
     #[inline]
-    pub fn options_iterator(&self) -> TcpOptionsIterator {
+    pub fn options_iterator(&self) -> TcpOptionsIterator<'_> {
         TcpOptionsIterator::from_slice(self.options())
     }