The Stohlquist Tideline bootie features 5mm stretchy neoprene upper with a gusseted zipper entry.  The soles are a thick rubber with a proprietary Stohlquist tread pattern.  Rubber heel and toe caps increase durablity.  The Ergo fit closely hugs the shape of the foot to minimize air pockets.

If ordering to wear with a drysuit order 1 to 1 1/2 times larger than standard shoe size.