Eno Slapstraps Pro at REI
REI has both the regular (original, heavier, shorter) Slapstraps and also the better (IMHO) Slapstraps Pro on sale (Pro is longer for wider diameter trees,
& lighter--8 oz for Pro vs 12 oz for the Original). Pro is like $18, Original like $16, so definitely look at the PRO.
I just ordered one online; they're out, so it's on backorder and will ship whenever they receive it, sale price locked in, wahoo.