"In certain positions we had to look at our short-term and long-term options in making sure we had adequate cover," said Rassie Erasmus
Munster have today unveiled three new signings to the province with Rhys Marshall, Thomas du Toit and Cathal Sheridan all signing contracts.
Marshall joins from Super Rugby side the Chiefs after penning a three-year deal that will see him remain with the province until June 2019.
The hooker, who has made 22 Super Rugby appearances, debuted against the Highlanders in 2013 and was part of the Super Rugby winning campaign that year.
The 23-year-old New Plymouth native will link up with Munster provided he obtains a valid work permit.
South African Thomas du Toit will joins from Sale Sharks on a three month loan agreement also subject to a valid work permit.
The 21-year-old can play both loose and tight-head and has represented the Barbarians and South Africa "A", and played in two U20s World Championships. The Cape Town native is expected to arrive in mid-October.
Scrumhalf Cathal Sheridan who completed his time with the province last May returns to the fold on a short-term deal.
The Sligo-man made 35 Munster appearances and now returns to the squad after signing a three-month contract.
"In certain positions we had to look at our short-term and long-term options in making sure we had adequate cover," said director of rugby Rassie Erasmus.
"We are about to head into a fully loaded schedule across Europe and the PRO12 and needed to build on our depth in a few key areas so these short term contracts will help in that regard.
"Additionally with injuries to Mike Sherry and Kevin O'Byrne, Rhys Marshall will help in the immediate future and looking beyond that he is a talented long-term prospect for such a pivotal position within our squad."