Is down or down-alternative better for allergies?

Down-alternative (typically polyester or PrimaLoft microfiber) is the safer choice if you have feather or down sensitivities, and several picks here carry OEKO-TEX STANDARD 100 certification, which limits harmful substances in the textile. Real down can be hypoallergenic if properly cleaned, but down-alternative sidesteps the question entirely. Note that OEKO-TEX certifies the fabric, not allergen-free filling, so check return policies if allergies are a concern.