Valid on online orders placed 12/8/22 - 12/11/22 only. Must add code: B3G1 in Discount code box at checkout to be valid. Carts will not be edited once submitted for codes so PLEASE make sure you enter B3G1 at checkout. Please note the Glass cover of equal or lesser value will be discounted to free. Valid on glass covers in stock only. May only be used once per customer/household. To receive 4 Free Covers, 16+ covers must be added into your cart. One discount per order - may not be combined with any other code. Valid online at www.Switchables.com.