Solid shampoo and soap bars gain traction for ultralight hygiene

Recent coverage continues to position shampoo and solid soap bars as bottle-free, space-saving options for travel and backpacking. Dry leaves and other solid formats add leakage and portion-control benefits, but unresolved buying questions remain syndet versus traditional soap chemistry, verified weight, durability, drying, skin tolerance, cold-water lather, ingredients, and value.