At LE we always formulate our products using only the highest quality ingredients and choose ingredients that are less likely to cause allergic reactions. Many brands use HEMA monomer because it is good for adhesion and cheap and is therefore popular with many manufacturers who prefer price over quality. We choose to avoid ingredients such as HEMA, HEA, IBOA and other ingredients known to have a greater chance of causing an allergic reaction. At LE we believe we have a huge responsibility to keep the industry as safe as possible. This is why we choose to make all of our products from scratch here in Oregon, choosing only the finest raw materials and formulating them without using ingredients that are more likely to cause an allergic reaction.