I wasn't looking for a "security" wallet or a "hidden" wallet, so this wallet works just fine for me.  I like to wear it around my wrist, so slippage and/or temperature doesn't matter.  I've been wearing my own design/creation of wrist wallet for decades, but it's black and I wanted something in a neutral colour. I simply wear the wallet as an accessory like an arm band.  If people ask what it is, I either tell them it's a wrist wallet or I just shrug and say it's a wrist brace.