What is the difference between Superknit, Coreknit, Sportflex, and Leatherluxe bands?

Superknit uses a soft knit weave for all-day wear. Coreknit is a tighter, more structured knit suited to heavier training. Sportflex is a perforated silicone band designed for sweat and water resistance. Leatherluxe is a premium leather option built for off-wrist occasions like formal settings.

Do the strap-only listings work with an existing Whoop 4.0 device?

Whoop 5.0 bands use a different clasp architecture than the 4.0, so these straps are specifically designed for Whoop 5.0 hardware. If you are upgrading to the 5.0, any band in this collection fits. If you are on a 4.0, these straps will not fit; the 4.0 uses its own separate clasp system.

Which Whoop 5.0 band holds up best through training in Indian humidity?

Sportflex is the strongest choice: the perforated silicone does not absorb sweat and dries instantly. Coreknit is a close second. Superknit knit bands absorb some moisture but air-dry quickly. Leatherluxe is lifestyle wear only and should be swapped out before any training session.