Altura – flimsy crap in my experience. Permanently on sale at half price, and with good reason. Got a pair of 3/4s that have worn badly on the seat, and some tights that did similar on the front.
Buy padless tights and wear 3/4s underneath, you then have 2 layers of fabric over your pelvis/thighs/knees which makes a massive difference (and you can wear them for a few days as you’re changing the layer next to your skin daily). I’ve commuted all winter and done the Festive 500, had regular mornings when it’s been around -7C wearing Roubaix tights over non-roubaix shorts or 3/4s, and have only suffered tingly fingers as I’ve recently bought new winter gloves which aren’t quite as insulated as my old ones.
FWIW I like Castelli tights, currently on sale for 50 quid at Evans
https://www.evanscycles.com/castelli-velocissimo-2-bib-tight-EV247536