Soft Serve Rubber Strap, dual density toe post with soft rubber between the toes for unmatched comfort and fit. PVC-free. Textured non-slip, quick dry EVA foam. Cushy rebound foam provides instant comfort and durable support. Assembled with Water Based Glue. No-slip, non marking sponge rubber. Designed for heavy exposure. This style is Vegan friendly, contains no animal materials or by-products.