They exclude a bunch of stuff, like bikes not made by Novara. Below is a list of exclusions from google, it does look familiar and it doesnt mention dry suits.
Offer not valid on REI
-OUTLET.com items, REI
Adventures or REI
Offer not valid for sale or clearance items (prices ending in $._3 or $._9).
membership is required at checkout. Not a member? You can join for a one-time $20 fee during checkout.
Offer not valid on special orders, package discounts, prior purchases, REI
gift cards, REI
e-gift cards, passes and tickets, gift boxes, memberships, shop services, rentals.
Offer valid on Novara bicycles only; all other brands are excluded.
Offer not valid on hard-shell boats.
Offer not valid on any item with GPS technology, phones, or personal locator beacons.
Offer not valid on skis, boots or bindings; snowboards, boots or bindings.