Leggings, they're comfortable, versatile and ideal for every day. You can throw them on to take the dog for a walk, nip to the shops or dress them up for a put-together outfit.
However, not all leggings are alike. Cheap, ill-fitting pairs can be see-through in some lighting and sag around the knees and ankles. But when you get a great pair, that wash well and retain their shape you hold onto them for as long as possible.
M&S has released a pair, that it describes as 'magic' because they also double up as shapewear. They claim to 'pull you in' and give you a 'sculpted silhouette'.