Men's Flip- Flops QUIKSILVER CRYSTAL OASIS. Men's Flip- Flops QUIKSILVER CRYSTAL OASIS.Technical Features:- Water-friendly faux nubuck upper- Finely wove nylon toe post made with regenerated Econyl® nylon fibres- Soft Repreve® recycled polyester jersey lining backed with memory foam- Anatomically correct arch support- Engineered clear traction outsole allows print to show throughMaterial: Upper: Synthetic / Lining: Textile / Outsole: Sponge Rubber