Members can use coupon “ANNIV24” to get the extra 20% off 1 item.. Save on bags, backpacks, and suitcases. We’ve pictured the Outdoor Research 20-Liter Field Explorer Pack for $47 ($52 off). The coupon is for members only. If you’re not one yet, you can buy a lifetime membership for $30 and if you spend over $50, you’ll get a $30 Bonus Card for free (see the related offer below).