Like this, easy to get replacement blades. The one i bought came with two container, i use the small one, no need for big size with a smoothie for one
https://s.lazada.co.th/s.tUubJ
I bought one of these, 2+ years ago, still going strong, spare parts easily available, this model often has different brand names, maybe the same factory
https://s.lazada.co.th/s.tfciM
Probably but the weight is not something i notice, the Shark full face has good noise protection, depends how much you want to pay and perceived benefit
Ventilation on Shark are good, they've been making helmets for 30+ years. When i interchanged between a Shark and Shoei helmet for an hour+ commute i felt no difference in fact I'd say Shoei is over rated
I like Shark helmets, got a couple here from Shopee, good quality for the price, one open face one full face, first bought Shark 1999.
Full face helmets may not fit under the seat, depends on bike, i put mine in top box, open face under seat
Colds etc always get worse in the evening, maybe immune system is lower then. I've just started Amoxicillin as a preemptive strike for a chest infection following a cold, see if it stops it starting