Foldover elastic has a line scored lengthwise down the middle, so it folds over neatly and easily. Typically used in making inner wear - to enclose raw edges such as at the waist and leg opening of undies. The Neon edge elastic is probably best for the waist rather than leg openings, and it might also be suitable for something like finishing/ gathering raincoat or nylon windbreaker hems. These are all thin - less than 1mm thick. Not suitable for applications such as elastic-waisted pants or skirts. To preserve the life of anything with elastic, avoid washing at high temperatures or tumble drying.
Pink stripe is a soft pink with maroon stripes. Neon edge is a dark blueish steel grey with highlighter green edging. Raspberry trimmed is a dark pinkish red has an extra satiny design on top of the elastic - when folded, the side facing away from the fabric has small lacy scallops (see last photo).