What attachments are offered and what's the perk?

Groove Wallet Go Leather Attachment:The Groove Wallet Go Leather sleeve is offered as an attachment to the Groove Wallet™. This sleeve keeps your look minimalistic while only adding 4mm to the overall width (12.5 with leather card holder, 8.5 without). It can hold three cards and is made with genuine premium leather. The money strap can hold 10 tri-folded dollar bills. Offered in brown and black!

Money Clip: The money clip, included with each Groove Wallet™, is an attachment to hold your dolla bills! 💸 It comes in midnight black and is a powder coated high-strength steel spring clip. The money clip can hold about 10 tri-folded bills!