A medical access sheath including a first member, a second member and a third member. The first member includes a longitudinal length and a channel therethrough. The first member includes a slit along the longitudinal length. The channel is configured to expand from a first cross-sectional size to a larger second cross-sectional size. The slit is configured to enlarge as the channel expands. The second member is connected to the first member proximate the slit. The second member extends across the slit. The second member is configured to expand from first configuration to second configuration. The third member is removably located within the channel. The third member is configured to keep the second member in the first configuration when the third member is located in the channel. The third member is configured to release the second member to the second configuration when the third member is removed from the channel.
