The Astral Pusha Boot is an amphibious, expedition-grade river boot built for daily paddling and the most adventurous river trips of the year. Astral stitched and bonded the super-sticky G Rubber outsole directly to the rugged, quick-drying upper for maximum durability. The Pusha also has a removable Rechargeable midsole that you can dry out or replace once it's lost its cushioning. The boot's Biodynamic Shape has a wider toe than Astral's Original Shape, which was already plenty wide, giving a surprisingly barefoot-like feel and natural gait. The G.SS rubber sole ensures wet/dry traction with 6mm lugs.