The Roots Brown Combs Are Made From Cellulose (Plant Based Extract) Acetate, Which Helps Cut Down On Static Resulting In Lesser Frizz And Flyaways. This Material Also Makes These Combs Hypoallergenic Which Means They Are Skin Friendly And Will Not Cause Any Form Of Allergy On Any Skin Type. Moreover, The Combs Are Seamless, Which Means They Have Smoothened And Rounded Tips That Massage The Scalp And Stimulate The Natural Oils And Smoothened Teeth Edges To Prevent Scraping Of The Hair Cuticles And Scalp While Styling Dry/Wet Hair. Watch The Hair Behave And Stay In Place As You Witness A Comfortable And Irritation-Free Hair Combing Experience, With Every Stroke. Ordinary Combs have sharp edges that damage the cuticle, roughen the scales and cause unhealthy split hair. In fact, such combs actually undo treatments of even the best shampoos! Roots Combs have rounded teeth that massage the scalp and stimulate natural oils in the hair cuticle. This keeps scales smooth, so hair stays strong and healthy. Always and only use a Roots comb and hair brush. Then watch your hair bounce back to life. Product Dimensions in cm (LXB) Pocket Comb 30A -15.3 x 2.5 Wide Teeth Comb 31 -10 x 6.4 Dressing Comb 32A -20.2 x 3.7 Fine Teeth Comb 32B -20.2 x 3.7