Macy's continues to discount a selection of Bioworld Men's Onesies and Pajama Sets, with prices starting from $11.96. Pad your order with a beauty item (they start at $3) to bag free shipping; otherwise, shipping adds $10.95. A couple of best bets:

Bioworld Men's Batman Costume for $15.93 (pictured, $24 off)

Bioworld Men's Shark Onesie Costume for $27.99 ($12 off)