Burt's Bees' All-Weather SPF 15 Moisturizing Lip Balm Blister defends lips from harsh environmental conditions season after season. Zinc oxide delivers broad-spectrum SPF 15 sun protection to reduce the risk of sunburn and long-term UV damage.Water-resistant, this lip balm stays in place for up to 40 minutes during swimming and intense exercise. Its formula uses naturally derived ingredients to provide its benefits and contains no parabens, phthalates, or petrolatum.