Silk pillow cases are really useful to people with curly and coilled hair! Cotton pillow cases makes that kind of hair super frizzy, but a silk case can be softer on the hair meaning your curls are still intact in the morning :) Often people will use a silk wrap or hear wear instead of a silk pillow as they can ve cheaper and keep your hair more secure. It's personal preference but can really help reduce frizz! Hope that helps
Edit: bloody spelling
Absolutely love organic maps for cycling! It recommendeds sensible routes that are much safer. The only feature I miss (and I know organic maps strives for 100% feature completeness even offline so this would be unlikely to be added) is navigation using public transit in the UK. The national rail app is painfully slow and isn't easy to just search a location and just go, but it does work. Every bus company has their own app too... I haven't found a good replacement yet unfortunately :/