What are " hybrid strings"

[alembic1989]

Looking for single bass strings on an American website...they sell plain strings and " hybrid strings"... What are hybrid strings???

[HowieBass]

It's my understanding that a hybrid set features a variety of string gauges not regarded as a standard set by them so let's suppose they have a few sets that are regarded as light, medium and heavy, they'll select one or two strings from each set that together are neither light, nor medium, nor heavy gauge, but a combination and hence hybrid.

[EmmettC]

Ernie Ball call their 45, 65, 85, 105 set hybrid, this is a fairly common set, but EB have a light 45-100 or medium 50-105, and their hybrid is a mix of both.