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Door Draft Stopper Snake, Slate Grey/Yellow/Floral by Ogsplosh - $20
Draft-stopping door snake. This may seem a little old timey, but there is nothing like a door snake for quickly and easily stopping a big draft from whooshing under your door. Thankfully there are many stylish door snakes being made now (like the one shown here); a quick search on Etsy is sure to produce tons of cute options.